WO2007136053A1

WO2007136053A1 - Blur correction device, optical device using the same, method for manufacturing the same and method for operating the same

Info

Publication number: WO2007136053A1
Application number: PCT/JP2007/060414
Authority: WO
Inventors: Kazutoshi Usui
Original assignee: Nikon Corporation
Priority date: 2006-05-24
Filing date: 2007-05-22
Publication date: 2007-11-29
Also published as: JP5239856B2; JPWO2007136053A1

Abstract

Disclosed are a miniaturized blur correction device, an optical device using the blur correction device, a method for manufacturing the blur correction device, and a method for operating the blur correction device. Specifically disclosed is a blur correction device characterized by comprising a movable part (12) having a correction portion for correcting an image blur, a supporting part (13) movably supporting the movable part (12), and elastic members (14a, 14b) having a first portion fixed to one of the movable part (12) and the supporting part (13) and a second portion slidable on the other one of the movable part (12) and the supporting part (13).

Description

Specification

Blur correction apparatus, optical apparatus using the same, manufacturing method and operation method thereof

[0001] The present invention relates to a shake correction apparatus, an optical apparatus using the same, a manufacturing method thereof, and an operation method thereof.

Background art

[0002] Conventionally, a shake correction device for correcting image blur caused by vibration applied to an optical device such as a camera by moving the shake correction lens in a direction perpendicular to the optical axis has a shake correction lens. An anti-rotation mechanism is provided for preventing the rotating lens frame from rotating in a plane perpendicular to the optical axis.

However, when a shake correction device is mounted on a small camera or the like, there is a problem that a space for providing a rotation stop mechanism is required, which becomes a factor that hinders downsizing. Patent Document 1: Japanese Patent No. 3713818

Disclosure of the invention

Problems to be solved by the invention

[0003] An object of the present invention is to provide a shake correction apparatus that can be miniaturized, an optical apparatus using the same, a manufacturing method thereof, and an operation method thereof.

Means for solving the problem

[0004] The present invention solves the above problems by the following means.

According to the first aspect of the present invention, there is provided a movable portion having a correction portion for correcting image blur, a support portion that movably supports the movable portion, and a first portion fixed to one of the movable portion and the support portion. And an elastic member having a second portion that is slidable with the other of the movable portion and the support portion.

The invention of claim 2 is the shake correction apparatus according to claim 1, wherein the correction unit is a shake correction lens or an image sensor.

The invention of claim 3 is the shake correction apparatus according to claim 1, wherein the elastic member is a wire. The invention of claim 4 is the shake correction apparatus according to claim 1, wherein the elastic member has a substantially circular cross-sectional shape.

According to a fifth aspect of the present invention, in the shake correction device according to the first aspect, one of the movable portion and the support portion has a fixing portion to which the first portion of the elastic member is fixed, The other of the movable part and the support part includes a coupling part with which the second part of the elastic member is engaged.

The invention of claim 6 is the shake correction apparatus according to claim 5, wherein the engaging portion is a through hole or a notch.

The invention according to claim 7 is the shake correction apparatus according to claim 1, wherein the elastic member includes a plurality of elastic members.

The invention according to claim 8 is the shake correction device according to claim 2, wherein the elastic member is a plurality, and between the one elastic member and the other elastic member, the shake correction lens or the An image stabilization device including an image sensor.

The invention according to claim 9 is the shake correction device according to claim 8, wherein the shake correction lens or the distance between the image pickup device and the one elastic member, and the shake correction lens or the image pickup device and the other. The blur correction device is characterized in that the distance from the elastic member is equal.

According to a tenth aspect of the present invention, in the shake correction device according to the fifth aspect, the correction unit is a blur correction lens or an image sensor, and the engagement unit includes a plurality of engagement units. The shake correction device is characterized in that the shake correction lens or the imaging element is provided between the engagement portion and the engagement portion.

The invention of claim 11 is the shake correction device according to claim 10, wherein the shake correction lens or the distance between the image sensor and the one engaging portion, and the shake correction lens or the image sensor and the The blur correction device is characterized in that the distance from the other engaging portion is equal.

The invention of claim 12 is the shake correction apparatus according to claim 1, wherein the second portion of the elastic member is V closer to the outer edge than the center of the movable portion or the support portion, and A shake correction device characterized in that the movable part or the support part is engaged! is there.

The invention of claim 13 is a movable part having a correction part for correcting image blur, a support part for movably supporting the movable part, and a first part fixed to one of the movable part and the support part. And a resilient member having a second portion engaged with the other of the movable portion and the support portion with a degree of freedom.

The invention of claim 14 is the shake correction apparatus according to claim 13, wherein the correction unit is a shake correction lens or an image sensor.

The invention of claim 15 is the shake correction apparatus according to claim 13, wherein the elastic member has a substantially circular cross-sectional shape.

The invention of claim 16 is the shake correction apparatus according to claim 13, wherein one of the movable part and the support part has a fixed part to which the first part of the elastic member is fixed, The other of the support part and the support part includes an engaging part with which the second part of the elastic member is engaged.

The invention of claim 17 is the shake correction apparatus according to claim 16, wherein the engaging portion is a through hole or a notch.

The invention according to claim 18 is the shake correction device according to claim 14, wherein the elastic member is a plurality, and the blur correction lens or the elastic member is interposed between one elastic member and the other elastic member. An image stabilization device including an image sensor.

The invention of claim 19 is the shake correction device according to claim 18, wherein the shake correction lens or the distance between the image sensor and the one elastic member, and the shake correction lens or the image sensor and the The blur correction device is characterized in that the distance from the other elastic member is equal.

The invention of claim 20 has a correction portion for correcting image blur, and is fixed to one of the second member that can move relative to the first member, and the first member and the second member. And a resilient member having a second portion that is slidable with the other of the first member and the second member.

The invention of claim 21 is the shake correction apparatus according to claim 20, wherein the correction unit is a shake correction lens or an image sensor. The invention of claim 22 is the shake correction apparatus according to claim 20, wherein the elastic member has a substantially circular cross-sectional shape.

The invention of claim 23 is the shake correction apparatus according to claim 20, wherein one of the second member and the first member has a fixing portion to which the first portion of the elastic member is fixed. The other of the second member and the first member includes an engagement portion that engages with the second portion of the elastic member.

The invention of claim 24 is the shake correction apparatus according to claim 23, wherein the engaging portion is a through hole or a notch.

The invention according to claim 25 is the shake correction device according to claim 21, wherein the elastic member is a plurality, and the shake correction lens or the elastic member is interposed between one elastic member and the other elastic member. An image stabilization device including an image sensor.

The invention of claim 26 is the shake correction apparatus according to claim 25, wherein the shake correction lens or the distance between the image sensor and the one elastic member, and the shake correction lens or the image sensor and the The blur correction device is characterized in that the distance from the other elastic member is equal.

The invention of claim 27 has a correction portion for correcting image blur, and is fixed to one of the second member and the first member and the second member that are movable relative to the first member. And a resilient member having a second part that is engaged with the other of the first member and the second member with a degree of freedom. .

The invention of claim 28 is the shake correction apparatus according to claim 27, wherein the correction unit is a shake correction lens or an image sensor.

The invention of claim 29 is the shake correction apparatus according to claim 27, wherein the elastic member has a substantially circular cross-sectional shape.

The invention of claim 30 is the shake correction apparatus according to claim 27, wherein one of the second member and the first member has a fixing portion to which the first portion of the elastic member is fixed. The other of the second member and the first member includes an engagement portion that engages with the second portion of the elastic member.

The invention of claim 31 is the shake correction apparatus according to claim 30, wherein the engaging portion is The blur correction device is a through hole or a notch.

The invention of claim 32 is the shake correction device according to claim 28, wherein the elastic member is plural, and the shake correction lens or the elastic member is interposed between the one elastic member and the other elastic member. An image stabilization device including an image sensor.

The invention according to claim 33 is the shake correction apparatus according to claim 32, wherein the shake correction lens or the distance between the image sensor and the one elastic member, and the shake correction lens or the image sensor and the The blur correction device is characterized in that the distance from the other elastic member is equal.

The invention of claim 34 is an optical apparatus (1) characterized by using the blur correction device according to claim 1.

The invention of claim 35 is an optical apparatus (1) characterized in that the blur correction apparatus according to claim 13 is used.

A thirty-sixth aspect of the invention is an optical instrument (1) using the blur correction device according to the twentieth aspect.

The invention of claim 37 is an optical apparatus (1) characterized in that the blur correction apparatus according to claim 27 is used.

The invention of claim 38 is a method for manufacturing a shake correction apparatus, comprising a movable part having a correction part for correcting image blur, and a support part for movably supporting the movable part. A first part of the elastic member is fixed to one of the movable part and the support part, and the other part of the movable part and the support part and a second part different from the first part of the elastic member are provided. It is a manufacturing method characterized by enabling sliding.

The invention of claim 39 is the manufacturing method according to claim 38, wherein the correction section is a shake correction lens or an image sensor.

The invention of claim 40 is the manufacturing method according to claim 39, wherein the elastic member is plural, and the blur correction lens or the imaging device is provided between one elastic member and another elastic member. It is a manufacturing method characterized by including an element.

The invention of claim 41 is a method of manufacturing a shake correction apparatus, comprising a movable part having a correction part for correcting image blur and a support part that movably supports the movable part, The first part of the elastic member is fixed to one of the movable part and the support part, the other of the movable part and the support part, and a second part different from the first part of the elastic member, This is a manufacturing method characterized by having a degree of freedom between the two.

The invention of claim 42 is the manufacturing method according to claim 41, wherein the correction section is a shake correction lens or an image sensor.

The invention of claim 43 is the manufacturing method according to claim 42, wherein the elastic member is a plurality, and the blur correction lens or the imaging device is provided between one elastic member and the other elastic member. It is a manufacturing method characterized by including an element.

The invention of claim 44 is a method of manufacturing a shake correction apparatus, comprising a second member having a correction portion for correcting image blur, and capable of moving relative to the first member, wherein the first member A first portion of an elastic member fixed to one of the member and the second member, and the other of the first member and the second member and a second portion different from the first portion of the elastic member Is a slidable manufacturing method.

The invention of claim 45 is the manufacturing method according to claim 44, wherein the correction section is a shake correction lens or an image sensor.

The invention of claim 46 is the manufacturing method according to claim 45, wherein the elastic member is a plurality, and the blur correction lens or the imaging device is provided between one elastic member and the other elastic member. It is a manufacturing method characterized by including an element.

The invention of claim 47 is a method of manufacturing a shake correction apparatus, comprising a correction member for correcting image blur, and preparing a second member that is movable relative to the first member, wherein the first member A first portion of an elastic member fixed to one of the member and the second member, and the other of the first member and the second member and a second portion different from the first portion of the elastic member It is a manufacturing method characterized by having a degree of freedom between the two.

The invention according to claim 48 is the manufacturing method according to claim 47, wherein the correction section is a shake correction lens or an image sensor.

The invention according to claim 49 is the manufacturing method according to claim 48, wherein the elastic member is a plurality, and the blur correction lens or the imaging device is provided between one elastic member and another elastic member. It is a manufacturing method characterized by including an element. The invention of claim 50 is a method for operating a shake correction device, comprising a movable part having a correction part for correcting image blur, and a support part for movably supporting the movable part. A first part of the elastic member is fixed to one of the movable part and the support part, and the other part of the movable part and the support part and a second part different from the first part of the elastic member are provided. An operation method of a shake correction apparatus characterized by being slidable.

The invention of claim 51 is an operation method of a shake correction apparatus, comprising a movable part having a correction part for correcting image blur, and a support part for movably supporting the movable part. A first portion of the elastic member is fixed to one of the movable portion and the support portion, and the other of the movable portion and the support portion and a second portion different from the first portion of the elastic member This is a method of operating a shake correction apparatus characterized in that a degree of freedom is provided between them.

The invention of claim 52 is a method of operating a shake correction apparatus, comprising a correction member for correcting image blur, and preparing a second member that is movable relative to the first member, wherein the first member A first portion of an elastic member fixed to one of the member and the second member, and the other of the first member and the second member and a second portion different from the first portion of the elastic member This is a method of operating the shake correction device, characterized in that it is slidable.

The invention of claim 53 is an operation method of a shake correction apparatus, comprising a correction member for correcting image blur, and preparing a second member that can move relative to the first member, wherein the first member A first portion of an elastic member fixed to one of the member and the second member, and the other of the first member and the second member and a second portion different from the first portion of the elastic member This is a method of operating a vibration reduction device characterized by having a degree of freedom between the two.

The above-described configuration may be improved as appropriate, and at least a part of the configuration may be replaced with another component.

The invention's effect

[0005] According to the present invention, it is possible to provide a shake correction apparatus that can be miniaturized, an optical apparatus using the same, a manufacturing method thereof, and an operation method thereof.

Brief Description of Drawings

FIG. 1 is a diagram illustrating a camera 1 according to the present embodiment.

FIG. 2 is a diagram for explaining a shake correction apparatus 10 of the present embodiment. FIG. 3 is a cross-sectional view of the vibration reduction device 10 cut along an arrow A1A1 shown in FIG.

4 is a cross-sectional view of the blur correction device 10 cut along an arrow BB shown in FIG.

FIG. 5 is a diagram for explaining a state of engagement between the panel members 14a and 14b and the panel receiving portions 12a and 12b.

FIG. 6 is a block diagram showing the operation of the shake correction apparatus 10 of the present embodiment.

FIG. 7 is a diagram for explaining the rotation of the movable lens frame 12;

FIG. 8 is a diagram for explaining how the rotation of the movable lens frame 12 is regulated by the panel members 14a and 14b.

Explanation of symbols

[0007] 1: camera, 10: shake correction device, 11: shake correction lens, 12: movable lens frame, 12a, 12b: panel receiving part, 13: base part, 14a, 14b: panel member

BEST MODE FOR CARRYING OUT THE INVENTION

[0008] Hereinafter, the present invention will be described in more detail with reference to the drawings and the like. In the following embodiment, a camera will be described as an example of an optical apparatus.

[0009] (Embodiment)

FIG. 1 is a diagram illustrating the camera 1 according to the present embodiment.

FIG. 2 is a diagram illustrating the shake correction apparatus 10 of the present embodiment. FIG. 2 shows a state in which the shake correction apparatus 10 is also viewed from the subject side force of the camera 1.

FIG. 3 is a cross-sectional view of the blur correction apparatus 10 taken along arrows A1-A1 shown in FIG. Note that the reference numerals in parentheses in FIG. 3 correspond to the cross section when cut by the arrows A2-A2 shown in FIG.

FIG. 4 is a cross-sectional view of the blur correction device 10 taken along arrows BB shown in FIG. The camera 1 of the present embodiment includes a camera body 2, a photographing unit 3, a release button 4, shake detection sensors AVI and AV2, a shake correction device 10 and the like. The camera 1 has a lens group (not shown) in addition to the blur correction lens 11 as a photographing optical system.

[0010] The shake detection sensors AVI and AV2 are shake detection units formed by an angular velocity sensor such as a gyro sensor. The shake detection sensors AVI and AV2 are angular velocities around two detection axes (X-axis and Y-axis) perpendicular to the optical axis (Z-axis) of the camera 1 as a whole. Degrees are detected, and when the release button 4 is operated, the angular velocity components in each of these two directions are output. The shake around the Y-axis is called Yawing, the shake around the X-axis is called Pitching, and the blur correction operation normally corrects the image blur caused by this two-way shake. Is done.

As shown in FIG. 2, the shake correction device 10 includes a movable lens frame 12, a base portion 13, shake correction actuators VI and V2, lens position detection sensors SI and S2, non-member members 14a and 14b, balls 20 Etc.

The movable lens frame 12 includes a shake correction lens 11, panel receiving portions 12a and 12b, drive magnets 151 and 152, and position detection magnets 171 and 172.

The image stabilization lens 11 constitutes a part of the photographic optical system, and shoots with respect to the photographic unit 3 (imaging device, film, etc.) arranged in the focal plane of the photographic optical system within a plane substantially orthogonal to the Z axis. It is a lens that corrects image blur in the photographic unit 3 by moving in a direction that cancels out image blur of the subject caused by camera shake. The blur correction lens 11 is assembled to the movable lens frame 12 and is movable integrally with the movable lens frame 12 in a plane substantially orthogonal to the Z axis.

The base portion 13 is an electric board that movably supports the movable lens frame 12, and includes drive coinets 161 and 162, Honore elements 181 and 182, Maoka plate 19, Bonore receptacle 21 and the like. In the present embodiment, the base portion 13 is fixed to the camera body 2 of the camera 1.

The blur correction actuators VI and V2 are drive units that generate a driving force for moving the blur correction lens 11 and the movable lens frame 12. In the present embodiment, the blur correction actuators V1 and V2 are arranged at positions obtained by rotating the X axis and the Y axis by 45 ° in a plane perpendicular to the Z axis.

As shown in FIG. 3, the image stabilizer VI is a driving magnet 151 provided on the base 13 side of the movable lens frame 12 and a movable lens frame 12 side of the base 13 facing the driving magnet 151. By combining with the driving coil 161 provided at the position to be operated, it functions as a voice coil motor. Similarly, the blur correction actuator V2 functions as a voice coil motor by combining the driving magnet 152 and the driving coil 162. The land portions (not shown) of the drive coils 161 and 162 are Is provided in the service section 13.

[0013] The driving magnets 151 and 152 are polarized and polarized in two poles in the driving directions (arrow C direction and arrow D direction) of the blur correction actuators VI and V2, respectively. When a current flows through the driving coils 161 and 162, driving forces in the arrow C direction and the arrow D direction are generated in the blur correction actuators VI and V2, respectively. With this driving force, the blur correction actuators VI and V2 drive the blur correction lens 11 and the movable lens frame 12 in the directions of arrow C and D, respectively. In the present embodiment, the directions of the driving forces (arrow C direction and arrow D direction) of the blur correction actuators VI and V2 are orthogonal to each other.

[0014] The blur correction actuators VI and V2 are arranged on the base portion 13 side of the driving magnet 151, 152 force S movable lens frame 12, so that the driving magnets 151, 152 and the driving coil 161, The distance to 162 can be reduced, and the driving force can be generated efficiently.

Further, since the driving coils 161 and 162 are provided in the base portion 13, wiring to the movable lens frame 12 for driving the blur correction actuators VI and V2 is unnecessary, and the movable lens frame 12 Will not hinder the movement.

The lens position detection sensors SI and S2 are position sensors that detect the position of the blur correction lens 11. In the present embodiment, the lens position detection sensors SI and S2 are positions obtained by rotating the X axis and the Y axis by 45 ° in a plane perpendicular to the Z axis, respectively, and the optical axis of the vibration reduction lens 11 is centered. Are provided at positions facing the blur correction actuators VI and V2.

Lens position detection sensor S1 detects the position of shake correction lens 11 in the direction of arrow C, and lens position detection sensor S2 detects the position of shake correction lens 11 in the direction of arrow D. The directions for detecting are orthogonal to each other.

As shown in FIG. 3, the lens position detection sensor S1 includes a detection magnet 171 provided on the side opposite to the base portion 13 of the movable lens frame 12, and a movable lens frame 12 side of the base portion 13. By combining the Hall element 181 provided at a position facing the detection magnet 171, it functions as a position detection sensor. Similarly, the lens position detection sensor S2 functions as a position detection sensor by combining the detection magnet 172 and the Hall element 182. The detection magnets 171 and 172 are polarized and polarized in two poles in the direction of the position detection of the lens position detection sensors SI and S2 (arrow C direction and arrow D direction), respectively. When the motion compensation lens 11 and the movable lens frame 12 are driven by the motion compensation actuators VI and V2, the detection magnets 171 and 172 move together with the movable lens frame 12, so the holes of the detection magnets 1 71 and 172 The magnetic flux density at the position of elements 181, 182 changes. The lens position detection sensors SI and S2 detect the position of the blur correction lens 11 in the directions of arrows C and D, respectively, by the Hall elements 181 and 182 reading this change in magnetic flux density.

[0017] The detection magnets 171, 172 are arranged on the opposite side of the base portion 13 of the movable lens frame 12, so that the distance between the detection magnets 171, 172 and the Hall elements 181, 182 is increased. Can be secured. Further, even when the tolerance in the thickness direction of the detection magnets 171, 172 varies, the distance between the detection magnets 171, 172 and the Hall elements 181, 182 does not vary. Therefore, the lens position detection sensors SI and S2 can obtain stable detection characteristics regardless of the tolerance in the thickness direction of the position detection magnets 171 and 172.

In this embodiment, the drive magnets 151 and 152 and the detection magnets 171 and 172 are arranged such that the center of gravity of the movable lens frame 12 is near the optical axis of the shake correction lens 11.

In FIG. 4 and FIG. 5, panel members 14a and 14b have a panel property and are formed of a wire having a substantially circular cross section. As shown in FIG. 4, one end of the panel members 14a and 14b is inserted into the through holes 13a and 13b provided in the base portion 13 and fixed by soldering, and the other end is fixed. The panel receiving portions 12al2a and 12b provided on the movable lens frame 12 are engaged with each other with a degree of freedom. The material of the panel members 14a and 14b is preferably a material having panel properties such as phosphor bronze and beryllium copper and having good solder wettability. The panel receiving portions 12a and 12b are circular through holes formed in the movable lens frame 12, and the diameter thereof is larger than the diameter of the panel members 14a and 14b. In the present embodiment, in order to facilitate assembly, the base portion 13 side has a portion formed in a substantially conical shape so that the diameter on the base portion 13 side is increased.

The panel receivers 12a and 12b are connected to the optical axis of the vibration reduction lens 11 as shown in FIG. The distance is provided at a position that is point-symmetric about the optical axis of the vibration reduction lens 11. In the present embodiment, the panel members 14a and 14b and the panel receiving portions 12a and 12b are provided at positions away from the optical axis force of the shake correction lens 11, and when the posture of the camera 1 is the normal position. Are arranged on a straight line in the horizontal direction. The normal position is an orientation in which the longitudinal direction of the shooting screen of the camera 1 is the horizontal direction.

FIG. 5 is a diagram for explaining the engagement between the panel members 14a and 14b and the panel receiving portions 12a and 12b. In FIG. 5, the vicinity of the panel receiving portion 12a of the movable lens frame 12 is shown in an enlarged manner, and the reference numerals in parentheses correspond to the vicinity of the panel receiving portion 12b. Further, the horizontal direction and the vertical direction in the figure are the horizontal direction and the vertical direction when the camera 1 is in the normal position. As described above, since the diameters of the panel receiving portions 12a and 12b are larger than the diameters of the panel members 14a and 14b, the panel members 14a and 14b are arranged in the Z-axis direction with respect to the panel receiving portions 12a and 12b, and The movable lens frame 12 is engaged with a degree of freedom in the moving direction.

The panel members 14a and 14b are configured so that the optical axis of the vibration reduction lens 11 coincides with the optical axis (not shown) of other lenses, and the movable lens frame 12 rotates relative to the base portion 13. The center of the panel receiving portions 12a, 12b and the center of the panel members 14a, 14b are shifted so that they are in contact with a part of the panel receiving portions 12a, 12b in a non-removed state (hereinafter referred to as an ideal state). (Hereafter, this state is called offset).

In the present embodiment, the panel members 14a and 14b and the panel receiving portions 12a and 12b are perpendicular to the panel receiving portions 12a and 12b in consideration of the weight of the movable lens frame 12 including the blur correction lens 11 and the like. Offset in the direction. That is, when the camera is in the normal position and the relationship between the panel receiving portions 12a, 12b and the panel members 14a, 14b is in an ideal state, the upper side of the imaging screen of the panel members 14a, 14b in the vertical direction The partial force is arranged so as to contact the upper side of the panel receiving portions 12a, 12b.

As shown in FIG. 4, the position of the movable lens frame 12 in the Z-axis direction with respect to the base portion 13 is determined by a steel plate 19, Bonore 20, and Bonore receiving rod 21.

The ball 20 is a member that is provided between the movable lens frame 12 and the base portion 13, supports the movable lens frame 12, and smoothly moves the movable lens frame 12. In this embodiment, the ball 20 has the magnetic force of the drive magnets 151 and 152 and the detection magnets 171 and 172. It is formed using a material other than a magnetic material so as not to be affected.

The ball receiving portion 21 is a concave-shaped member provided in the base portion 13, and the ball 20 is disposed therein and is held so as not to drop off. The ball receiving portion 21 has such a large size that the ball 20 does not collide with the wall surface of the ball receiving portion 21 even when the movable lens frame 12 moves within the movable range.

In the present embodiment, the ball 20 and the ball receiving portion 21 are provided at three locations, and are arranged so that the triangular center of gravity formed by connecting the positions thereof is on the optical axis of the shake correction lens 11. The number and position of the movable lens frame 12 are not particularly limited as long as the movable lens frame 12 can be supported and can be moved smoothly.

The steel plate 19 is provided on the opposite side of the base portion 13 from the movable lens frame 12 and at positions corresponding to the drive magnets 151 and 152 and the detection magnets 171 and 172.

The movable lens frame 12 is attracted to the base 13 side in the Z-axis direction by the magnetic force acting between the steel plate 19 and the drive magnets 151, 152 and the detection magnets 171, 172, and the ball 20 supports the movable lens frame 12. As a result, the position of the movable lens frame 12 in the Z-axis direction is determined.

FIG. 6 is a block diagram showing a circuit related to the operation of the shake correction apparatus 10 of the present embodiment.

The camera 1 includes a power supply device 59, a main switch 60, a half-press switch 61, a full-press switch 62, and a CPU 55 that controls the shake correction device 10.

The main switch 60 is a switch that activates the camera 1.

The half-press switch 61 is a switch that is turned on when the release button 4 (see FIG. 1) is half-pressed. When the half-press switch 61 is turned on, the camera is ready to shoot, for example, AF (autofocus) operation An AF device (not shown), a photometry device (not shown), a shake correction device 10 and the like to be performed are activated. The full-press switch 62 is a switch that is turned on when the release button 4 is fully pressed, and shooting is performed when the full-press switch 62 is turned on.

The shake correction switch 63 is a switch for selecting whether or not to perform the shake correction operation. When turned on, the shake correction operation is performed.

[0024] In the shake correction operation, based on the detection result of shake by the shake detection sensors AVI and AV2. Then, the CPU 55 calculates the driving direction and driving amount of the blur correction lens 11, and according to the calculation result, drives and controls the blur correction lens 11 using the blur correction actuators VI and V2 and the lens position detection sensors SI and S2. Correct image blur.

The shake detected by the shake detection sensors AVI and AV2 passes through the final letters 51 and 52 as shake detection signals, is amplified by the amplifiers 53 and 54, and is manually supplied to the CPU 55.

The CPU 55 performs predetermined processing after the A / D conversion of the shake detection signal transmitted from the shake detection sensors AVI and AV2 by the built-in AZD converter 55a, and generates a shake correction control signal. The image stabilization control signal is transmitted from the CPU 55 to the DZA converter 56, converted to DZA by the DZA converter 56, and then input to the driver 57. The driver 57 drives the blur correction actuators VI and V2 according to the blur correction control signal. The blur correction actuators VI and V2 are driven based on the input blur correction control signal, and drive the blur correction lens 11 and the movable lens frame 12.

The lens position detection sensors SI and S2 detect the position of the shake correction lens 11. The detection signals detected by the lens position detection sensors SI and S2 are AZD converted by the AZD converter 58 and fed back to the CPU 55.

By performing the above control, the image blur is corrected.

[0027] It should be noted that in the shake correction device 10 of the present embodiment, when the shake correction switch 63 is turned ON! /, As described above, the shake correction actuators VI and V2 and the lens position detection sensor S1, Performs image stabilization using S2 etc. On the other hand, when the blur correction switch 63 is OFF, the blur correction operation is not performed, but the blur correction device 10 uses the blur correction actuators VI and V2, the lens position detection sensors SI and S2, and the like. The blur correction lens 11 and the movable lens frame 12 are controlled so that the optical axis of the blur correction lens 11 coincides with the optical axes of the other lenses.

FIG. 7 is a diagram for explaining the rotation of the movable lens frame 12.

In FIG. 7, the camera 1 is in the normal position, the shake correction device 10 is activated, the shake correction actuators VI and V2 generate the driving forces CI and D1, respectively, and the resultant force E of the driving forces CI and D1 This shows a state in which the vibration reduction lens 11 and the movable lens frame 12 are driven in the direction of the resultant force E. [0029] The control center P is a point that is equidistant from the position detection reference points of the lens position detection sensors SI and S2 in the respective position detection directions. In the present embodiment, the control center P is located on the optical axis of the blur correction lens 11 in a plane in which the movable lens frame 12 can move.

Here, the lens position detection sensors SI and S2 detect only the positions in the arrow C direction and the arrow D direction with respect to the positions of the blur correction lens 11 and the movable lens frame 12, respectively. Therefore, when the movable lens frame 12 is moved so as not to cause a positional shift (displacement) in the directions of the arrow C and D, the lens position detection sensors SI and S2 cannot detect the displacement.

[0030] If the movable lens frame 12 is about to rotate around a point different from the control center P, the lens position detection sensor SI, S2 force is displaced in either the arrow C direction or the arrow D direction. In order to detect, rotation of the movable lens frame 12 is suppressed by the control. However, if the movable lens frame 12 is rotated around the control center P, the lens position detection sensors SI and S2 are hardly displaced in the directions of the arrows C and D. In this case, the lens position The detection sensors SI and S2 may not be able to detect the rotation of the movable lens frame 12. Therefore, in the control system of the present embodiment, the movable lens frame 12 can be stabilized even at a position rotated relative to the base portion 13 around the control center P. That is, when there is no mechanism for restricting rotation, the movable lens frame 12 may rotate as if the control center P has the center of rotation.

[0031] As shown in FIG. 7, when the movable lens frame 12 is driven in the direction of the resultant force E of the blur correction actuators VI and V2, and the driving force CI and D1, the control center P and the action point of the resultant force E Because of the separation, the resultant force E generates a rotational moment around the control center P. By this rotation moment, the movable lens frame 12 tries to rotate in the direction of arrow F around the control center P.

Such rotation of the movable lens frame 12 causes a decrease in the control accuracy of the shake correction lens 11.

In the present embodiment, the rotation of the movable lens frame 12 described above is restricted using the panel members 14a and 14b. The operation of the rotation stopper by the panel members 14a and 14b will be described below. The

In FIG. 8, the posture of the camera 1 is the normal position. FIG. 8 (a) shows that the movable lens frame 12 and the base portion 13 are in an ideal state, and the panel members 14a and 14b and the panel receiving portions 12a and 12b are offset. FIG. 8 (b) shows a case where the movable lens frame 12 is about to rotate in the F1 direction from the state of FIG. 8 (a). Fig. 8 (c) shows the case where the movable lens frame 12 is about to rotate in the F2 direction from the state of Fig. 8 (a). Further, the horizontal direction and the vertical direction shown in FIG. 8 are the horizontal direction and the vertical direction when the camera 1 is in the normal position.

As shown in FIG. 8 (a), in the ideal state, the panel members 14a and 14b are in contact with the upper side in the vertical direction of the panel receiving portions 12a and 12b.

Here, for example, the panel members 14a, 14b force are not offset with respect to the panel receiving portions 12a, 12b, and are arranged at substantially the center of the panel members 14a, 14b force panel receiving portions 12a, 12b. Think about the case. In this case, in the plane in which the movable lens frame 12 is movable, the panel members 14a and 14b and the panel receiving portions 12a and 12b have a degree of freedom, so that one of the panel members 14a and 14b is a panel. The movable lens frame 12 rotates until it comes into contact with the receiving portions 12a and 12b.

However, in this embodiment, as shown in FIG. 8 (b), when the movable lens frame 12 is about to rotate in the direction of the arrow F1 with the control center P as the center, the panel member 14b contacts the panel receiving portion 12b. It touches and is pushed in the direction of rotation (in the direction of arrow F1) by the panel receiving part 12b, and is crazed by its panel characteristics. Therefore, an urging force J1 is generated in the direction that restricts the rotation of the panel member 14b, and the rotation of the movable lens frame 12 can be immediately controlled.

Similarly, as shown in FIG. 8C, when the movable lens frame 12 is about to rotate in the direction of the arrow F2 around the control center P, the panel member 14a is in contact with the panel receiving portion 12a. Therefore, it is pushed in the direction of rotation (in the direction of arrow F2) by the panel receiving part 12a, and it is swollen by its panel property. Therefore, the urging force J2 is generated in the panel member 14a in the direction of restricting the rotation, and the rotation of the movable lens frame 12 can be immediately restricted.

[0034] As described above, according to the present embodiment, the panel members 14a and 14b are rotated by being pinched. An urging force acts in the direction to suppress, and the rotation of the movable lens frame 12 can be suppressed. Further, by using small components such as the screw members 14a and 14b, the rotation of the blur correction lens 11 and the movable lens frame 12 can be suppressed, and a smaller blur correction device can be obtained.

Further, since the panel members 14a and 14b are small in size, they can be arranged at a plurality of locations on the shake correction device. For this reason, rotation suppression can be performed stably in a plurality of locations. Further, since the panel members 14a and 14b have a substantially circular cross-sectional shape, the same biasing force is generated in various directions included in any plane in which the movable lens frame 12 is movable. Therefore, the movement of the movable lens frame 12 by the drive of the blur correction actuators VI and V2 is not hindered.

[0035] Furthermore, the blade members 14a, 14b and the panel receiving portions 12a, 12b are provided at positions away from the optical axis of the shake correction lens 11, and the panel members 14a, 14b are located with respect to the panel receiving portions 12a, 12b. Since the offset is offset, the rotation can be immediately controlled regardless of which direction the movable lens frame 12 tries to rotate.

Furthermore, in this embodiment, since the panel members 14a and 14b are offset with respect to the panel receiving portions 12a and 12b by an amount considering the weight of the movable lens frame 12, the shake correction switch 63 is turned OFF. Even in this case, the movable lens frame 12 can be supported in a direction in which the optical axis Z of the vibration reduction lens 11 coincides with the optical axes of the other lens groups. Therefore, it is possible to reduce the power for driving the blur correction actuators VI and V2 in order to control the position of the blur correction lens 11.

[0036] (Deformation)

Various modifications and changes can be made without being limited to the embodiment described above, and these are also within the equivalent scope of the present invention.

(1) In the present embodiment, the panel members 14a and 14b are the force shown in the example used in the shake correction device 10 that drives the shake correction lens 11 to correct the shake. It can also be used in a shake correction device that drives a movable frame that corrects image blur.

(2) In the present embodiment, the force shown in the example in which the panel members 14a and 14b are provided is not limited to this. For example, one panel member may be provided, or three or more panel members may be provided. Good. When installing one panel member, if it is located far from the control center P, the movable lens frame 12 can be efficiently rotated. Can be regulated.

(3) In the present embodiment, the panel members 14a, 14b are forces shown as examples used as members for restricting the rotation of the movable lens frame 12, but are not limited thereto. For example, the panel members 14a, 14b Energizing force due to the panel property of 14b If it is large enough to support the dead weight of the movable lens frame 12 and smaller than the driving force of the image stabilizers VI and V2, motion compensation operation is not performed. In this case, it can also function as a lock mechanism for holding the shake correction lens 11 and the movable lens frame 12 at a position where the optical axis of the shake correction lens 11 coincides with the optical axis of the other lens group. . By providing the panel members 14a and 14b with a function as a lock mechanism, it is possible to reduce power consumption for controlling the position of the shake correction lens 11 when the shake correction switch 63 is OFF.

(4) In the present embodiment, the panel member engaging portions 12a and 12b are through holes. However, the present invention is not limited to this, and may be a notch, for example.

(5) In the present embodiment, the force shown in the example in which the panel member engaging portions 12a and 12b are provided at positions symmetrical with respect to the optical axis of the blur correction lens 11 is not limited to this. For example, The panel members 14a and 14b may be provided at positions symmetrical with respect to the optical axis of the blur correction lens 11.

(6) In the present embodiment, the force shown in the example using the voice coil motor as the blur correction actuators VI and V2 is not limited to this, and other motors such as a stepping motor may be used.

(7) In the present embodiment, the force shown in the example using the detection magnets 171, 172 and the hall elements 181, 182 as the lens position detection sensors SI, S2 is not limited to this. For example, optically You can use an optical sensor that detects the position of the image stabilization lens!

(8) In the present embodiment, the panel members 14a and 14b are fixed to the base portion 13 by soldering. However, the present invention is not limited to this. For example, the panel members 14a and 14b may be fixed using an adhesive or the like. Also good.

(9) In the present embodiment, the panel members 14a and 14b are engaged with the movable lens frame 12 at their end portions on the movable lens frame 12 with a degree of freedom, and the end portions on the base portion 13 side. Although an example of fixing is shown, the present invention is not limited thereto, and for example, an end portion on the movable lens frame 12 side is fixed, and an end portion on the base portion 13 side is connected to a panel member engaging portion provided on the base portion flange _3. You may engage with a degree of freedom.

(10) In the present embodiment, an example in which the camera shake correction device 10 is provided in the camera 1 has been described. For example, a lens barrel or an interchangeable lens may be provided.

Further, the shake correction apparatus 10 may be used for a video camera, binoculars, a telescope, or the like that can shoot a moving image.

Claims

The scope of the claims

[1] a movable part having a correction part for correcting image blur;

A support part for movably supporting the movable part;

An elastic member having a first part fixed to one of the movable part and the support part, and a second part slidable with the other of the movable part and the support part. Blur correction device.

[2] In the blur correction device according to claim 1,

The correction unit is a shake correction lens or an image sensor.

A blur correction apparatus characterized by the above.

[3] In the blur correction device according to claim 1,

The blur correcting device, wherein the elastic member is a wire.

[4] The image stabilizer according to claim 1,

The blur correction device according to claim 1, wherein the elastic member has a substantially circular cross section.

[5] The blur correction device according to claim 1,

One of the movable part and the support part has a fixing part to which the first part of the elastic member is fixed,

The other of the movable part and the support part includes an engagement part with which the second part of the elastic member is engaged.

[6] The blur correction device according to claim 5,

The blur correction device, wherein the engaging portion is a through hole or a notch.

[7] In the blur correction device according to claim 1,

A blur correction device comprising a plurality of elastic members.

[8] In the image stabilizer according to claim 2,

There is a plurality of elastic members, and the blur correction device or the imaging device is provided between one elastic member and another elastic member.

[9] The shake correction device according to claim 8,

An interval between the blur correction lens or the image sensor and the one elastic member, and the A blur correction device characterized in that a blur correction lens or an interval between the imaging element and the other elastic member is equal.

[10] The blur correction device according to claim 5,

The correction unit is a shake correction lens or an image sensor,

There are a plurality of the engaging portions, and the blur correction lens or the imaging element is provided between the one engaging portion and the other engaging portion.

A blur correction apparatus characterized by the above.

[11] The blur correction device according to claim 10,

An interval between the blur correction lens or the image sensor and the one engaging portion and an interval between the blur correction lens or the image sensor and the other engaging portion are equal.

A blur correction apparatus characterized by the above.

[12] In the image stabilizer according to claim 1,!

The second part of the elastic member is closer to the outer edge than the center of the movable part or the support part, and is engaged with the movable part or the support part.

A blur correction apparatus characterized by the above.

[13] a movable part having a correction part for correcting image blur;

A support part for movably supporting the movable part;

A first portion fixed to one of the movable portion and the support portion; and an elastic member having a second portion engaged with the other of the movable portion and the support portion with a degree of freedom. A blur correction apparatus characterized by the above.

[14] The blur correction device according to claim 13,

The correction unit is a shake correction lens or an image sensor.

A blur correction apparatus characterized by the above.

[15] The blur correction device according to claim 13,

[16] The blur correction device according to claim 13,

One of the movable part and the support part has a fixing part to which the first part of the elastic member is fixed, The other of the movable part and the support part includes an engagement part with which the second part of the elastic member is engaged.

[17] The blur correction device according to claim 16,

[18] The blur correction device according to claim 14,

[19] The image stabilizer according to claim 18,

A blur correction device characterized in that an interval between the blur correction lens or the image sensor and the one elastic member and an interval between the blur correction lens or the image sensor and the other elastic member are equal.

[20] a second part having a correction part for correcting image blur and movable relative to the first member;

A first portion fixed to one of the first member and the second member; and an elastic member having a second portion slidable with the other of the first member and the second member. A blur correction device characterized by that.

[21] The shake correction device according to claim 20,

The correction unit is a shake correction lens or an image sensor.

A blur correction apparatus characterized by the above.

[22] The image stabilizer according to claim 20,

[23] The blur correction device according to claim 20,

One of the second member and the first member has a fixing portion to which the first portion of the elastic member is fixed,

The other of the second member and the first member includes an engagement portion with which the second portion of the elastic member engages.

[24] The image stabilizer according to claim 23, The blur correction device, wherein the engaging portion is a through hole or a notch.

[25] The image stabilizer according to claim 21, wherein

[26] The image stabilizer according to claim 25,

[27] a second member having a correction unit for correcting image blur and movable relative to the first member;

Elasticity having a first portion fixed to one of the first member and the second member, and a second portion engaged with the other of the first member and the second member with a degree of freedom. A shake correction device comprising: a member.

[28] The blur correction device according to claim 27,

The correction unit is a shake correction lens or an image sensor.

A blur correction apparatus characterized by the above.

[29] The blur correction device according to claim 27,

[30] The blur correction device according to claim 27,

[31] The blur correction device according to claim 30,

[32] The image stabilizer according to claim 28,

The elastic member is plural, and between one elastic member and another elastic member, A blur correction apparatus comprising the blur correction lens or the imaging device.

[33] The image stabilizer according to claim 32,

[34] An optical instrument using the blur correction device according to claim 1.

[35] An optical apparatus using the blur correction device according to claim 13.

[36] An optical instrument using the blur correction device according to [20].

[37] An optical instrument using the blur correction device according to claim 27.

[38] A method of manufacturing a shake correction apparatus,

A movable part having a correction part for correcting image blur and a support part for movably supporting the movable part are prepared,

A first portion of an elastic member is fixed to one of the movable portion and the support portion, and the other of the movable portion and the support portion and a second portion different from the first portion of the elastic member are provided. A manufacturing method characterized by being slidable.

[39] The manufacturing method according to claim 38,

The correction unit is a shake correction lens or an image sensor.

The manufacturing method characterized by the above-mentioned.

[40] The manufacturing method according to claim 39,

The elastic member is plural, and the blur correction lens or the imaging element is provided between one elastic member and the other elastic member.

The manufacturing method characterized by the above-mentioned.

[41] A method of manufacturing a shake correction apparatus,

The first portion of the elastic member is fixed to one of the movable portion and the support portion, and the other of the movable portion and the support portion is different from the first portion of the elastic member. A manufacturing method, wherein a degree of freedom is provided between the second portion and the second portion.

[42] The manufacturing method according to claim 41,

The correction unit is a shake correction lens or an image sensor.

The manufacturing method characterized by the above-mentioned.

[43] The manufacturing method according to claim 42,

The manufacturing method characterized by the above-mentioned.

[44] A method of manufacturing a shake correction apparatus,

Prepare a second part that has a correction part to correct image blur and can move relative to the first member.

A first portion of an elastic member is fixed to one of the first member and the second member, and the other of the first member and the second member is different from the first portion of the elastic member. 2. A manufacturing method characterized in that the portion 2 is slidable.

[45] The manufacturing method according to claim 44,

The correction unit is a shake correction lens or an image sensor.

The manufacturing method characterized by the above-mentioned.

[46] The manufacturing method according to claim 45,

There are a plurality of elastic members, and the blur correction lens or the image sensor is provided between one elastic member and another elastic member.

The manufacturing method characterized by the above-mentioned.

[47] A method of manufacturing a shake correction apparatus,

A first portion of an elastic member is fixed to one of the first member and the second member, and the other of the first member and the second member is different from the first portion of the elastic member. A manufacturing method characterized in that a degree of freedom is provided between the two parts.

[48] The manufacturing method according to claim 47, The correction unit is a shake correction lens or an image sensor.

The manufacturing method characterized by the above-mentioned.

[49] The manufacturing method according to claim 48,

The manufacturing method characterized by the above-mentioned.

[50] A method of operating the image stabilizer,

A first portion of an elastic member is fixed to one of the movable portion and the support portion, and the other of the movable portion and the support portion and a second portion different from the first portion of the elastic member are provided. A method of operating a shake correction apparatus, characterized by being slidable.

[51] A method of operating the image stabilizer,

A first portion of an elastic member is fixed to one of the movable portion and the support portion, and the other of the movable portion and the support portion is different from the first portion of the elastic member. Give freedom between

An operation method of a shake correction apparatus characterized by the above.

[52] A method of operating the image stabilizer,

A first portion of an elastic member is fixed to one of the first member and the second member, and the other of the first member and the second member is different from the first portion of the elastic member. 2 is slidable

An operation method of a shake correction apparatus characterized by the above.

[53] A method of operating the image stabilizer,

A second part that has a correction part for correcting image blur and that can move relative to the first member Prepare the materials,

A first portion of an elastic member is fixed to one of the first member and the second member, and the other of the first member and the second member is different from the first portion of the elastic member. Give freedom between 2 parts

An operation method of a shake correction apparatus characterized by the above.